Solve each system of linear equations by substitution.3x - 2y = 9
y = 2x - 7 Pease show all steps
Answers
Answer 1
Answer:
%3D9%20%5C%5C%203x-4x%2B14%3D9%20%5C%5C%20-x%2B14%3D9%20%5C%5C%20-14%5C%20%5C%20%5C%20%5C%20-14%20%5C%5C%20-x%3D-5%20%5C%5C%20%2F-1%2F-1%20%5C%5C%20%5C%20%5C%20x%3D5)
Answer 2
Answer:
3x-2y=9 will be
3x-9=2y and
(3x)/2-9/2=y
2) y=2x-7
if you mean the intersection , so y=y
(3x)/2-9/2=2x-7
1,5x-4,5=2x-7
-4,5+7=2x-1,5x
2,5=0,5x
x=2,5/0,5
x=5 is the answer
3x-9=2y and
(3x)/2-9/2=y
2) y=2x-7
if you mean the intersection , so y=y
(3x)/2-9/2=2x-7
1,5x-4,5=2x-7
-4,5+7=2x-1,5x
2,5=0,5x
x=2,5/0,5
x=5 is the answer
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if the graph of an exponential function passes through the points (1,6) and (4,48) find an equation of the function
Solve algebraically: Y = x^2 + 5x - 17 Y = x - 5
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3 inches of rain in 6 hours
Answers
half an inch of rain in an hour, or an inch of rain in 2 hours.
Answers
This is also known as constant of variation.
So, lets give an example
y = 4 and x = 2
If y = 8, what does x equal?
4*2 = 8
y = 8
x = 2
2*2 = 4
x = 4
We solve for the missing value based on the other value.
So, lets give an example
y = 4 and x = 2
If y = 8, what does x equal?
4*2 = 8
y = 8
x = 2
2*2 = 4
x = 4
We solve for the missing value based on the other value.
Answers
So 3/3 of the sections are colors, and 1/3 of the sections are blue, which means the probability of the spinner landing on NOT blue is 2/3.
The probability pf landing on blue is 25%
Answers
We can solve this without counting too much, like this:
When we look st Diya's fraction: it's about 2 : you can see that the top number is about twice as big as the lower one (compare 90 and 40 for this, 90 is a little more than twice 40)
When we look at Leo's fraction: 97 is a lot more than twice 5!!! To simplify compare 90 and 5: it is definitely at least 10 times bigger (actually 18).
So even if we just "look at" the fractions; Leo's fraction seems too big to be 2.(15).
In fact, his fraction is equal to 19.4
Diya was right!
(and 97/45 is exactly 2.(15).
When we look st Diya's fraction: it's about 2 : you can see that the top number is about twice as big as the lower one (compare 90 and 40 for this, 90 is a little more than twice 40)
When we look at Leo's fraction: 97 is a lot more than twice 5!!! To simplify compare 90 and 5: it is definitely at least 10 times bigger (actually 18).
So even if we just "look at" the fractions; Leo's fraction seems too big to be 2.(15).
In fact, his fraction is equal to 19.4
Diya was right!
(and 97/45 is exactly 2.(15).
Answers
the answer is 1/4 bella thought it was 2/4 because she divided by two then got 2/4.use 4 to find out urethane answer.
The answer is 1/2 because if you divide 4 from 4/8 u get 1/2
Answers
do those 2 equaiton you did
minus x on top
y=10-x
sub for y
x(10-x)=12
distribute
10x-x^2=12
minus (10x-x^2) both sides
0=x^2-10x+12
use quadratic formula
in form
ax^2+bx+c=0
x=
a=1
b=-10
c=12
x=%2B%2F-%20%5Csqrt%7B(-10)%5E%7B2%7D-4(1)(12)%7D%20%7D%7B2(1)%7D)
x=
x=
x=
x=
x=
or 
aprox
x=1.39445 or 8.60555
those are the 2 numbers since x and y can switch
minus x on top
y=10-x
sub for y
x(10-x)=12
distribute
10x-x^2=12
minus (10x-x^2) both sides
0=x^2-10x+12
use quadratic formula
in form
ax^2+bx+c=0
x=
a=1
b=-10
c=12
x=
x=
x=
x=
x=
x=
aprox
x=1.39445 or 8.60555
those are the 2 numbers since x and y can switch
I would make a list of the factors of 12. 1 and 12; 2 and 6; 3 and 4. However none of these add to 10. I would talk to a teacher about this one, since none of the answers are apparent at the moment. I will keep working.
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